Innovation has no secret for GM and after tapping into hybrid and electric engine technologies, fuel-cell is its next target. In an interview with Trucks.com , GM’s global fuel-cell business director Charles Freese seemed confident that hydrogen will become a next big step in transportation. General Motors has been involved in fuel-cell technology for a little more than 50 years now. DON’T MISS: Military hydrogen-powered Chevy Colorado ZH2 launches In 1966, the automaker introduced the Electrovan prototype that became the first hydrogen fuel-cells vehicle on the road. The Electrovan was followed by the Hy-wire concept introduced in 2002, then by the Project Driveway program that put more than 100 fuel-cell Chevrolet Equinox in driveways across the United States starting in 2007. Since the 1990s, the company has invested $2.5 billion into fuel-cell research and development....